Sony A7S III
full-frame · 2020
Sony FX3
full-frame · 2021
Sony A7S III takes it — here’s why.
In our weighted Specdex score, Sony A7S III lands at 91 and Sony FX3 at 90. That puts Sony A7S III ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Sony A7S III if…
- ✓Current-gen AF system
- ✓Proven lens ecosystem
- ✓Strong video + stills balance
Pick Sony FX3 if…
- ✓Current-gen AF system
- ✓Proven lens ecosystem
- ✓Strong video + stills balance
Winner by scenario
Derived from the sub-score breakdown · not a separate testPhoto
TieCompared on the photo sub-score
Effectively tied — neither pulls a 2-point weighted lead.
Autofocus
TieCompared on the autofocus sub-score
Effectively tied — neither pulls a 2-point weighted lead.
Video
TieCompared on the video sub-score
Effectively tied — neither pulls a 2-point weighted lead.
Value for money
Sony A7S IIISpecdex score per dollar at MSRP
Sony A7S III more score per dollar ($3,498 vs $3,898).
Score breakdown
Specs side-by-side
| Spec | Sony A7S III | Sony FX3 |
|---|---|---|
| Format | full-frame | full-frame |
| Release year | 2020 | 2021 |
Sony A7S III
- +Current-gen AF system
- +Proven lens ecosystem
- +Strong video + stills balance
- −Body price excludes lens
- −Heavy for travel (flagship)
- −Learning curve on menus
Sony FX3
- +Current-gen AF system
- +Proven lens ecosystem
- +Strong video + stills balance
- −Body price excludes lens
- −Heavy for travel (flagship)
- −Learning curve on menus
FAQ: Sony A7S III vs Sony FX3
Which is better, Sony A7S III or Sony FX3? +
Sony A7S III scores 91 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.
Is Sony A7S III worth the price? +
At $3,498, Sony A7S III delivers a Specdex score of 91 — strongest in photo.
Is Sony FX3 worth the price? +
At $3,898, Sony FX3 delivers a Specdex score of 90 — strongest in photo.
Does Sony A7S III or Sony FX3 last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.
Which is the better value, Sony A7S III or Sony FX3? +
Sony A7S III — more score per dollar ($3,498 vs $3,898). Specdex score per dollar at MSRP.